[aes] Upstream support for GCM - Part 23

[vogelpi]

This is the 23rd PR of a series of PRs to upstream support for AES-GCM. The original PR can be found here: vogelpi#31

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[aes/doc] Document Galois/Counter Mode (GCM) implementation + hardening

[nasahlpa]

Just out of curiosity, are you planning to also add the SCA analysis to the documentation?

[vogelpi]

Just out of curiosity, are you planning to also add the SCA analysis to the documentation?

Thanks for the approval. No, I am not planning to add this to the doc. We usually don't provide these results.

[vogelpi]

CHANGE AUTHORIZED: hw/ip/aes/data/aes.hjson
CHANGE AUTHORIZED: hw/top_earlgrey/rtl/autogen/top_earlgrey.sv

This PR exposes a compile-time Verilog parameter to the top-level such that we can later on disable the hardware GCM support if needed.

[nasahlpa]

CHANGE AUTHORIZED: hw/ip/aes/data/aes.hjson
CHANGE AUTHORIZED: hw/top_earlgrey/rtl/autogen/top_earlgrey.sv

This PR exposes a compile-time Verilog parameter to the top-level such that we can later on disable the hardware GCM support if needed.